JP2010003517A - Terminal metal fitting and terminal metal fitting block - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize weight saving of a terminal metal fitting used for a ground terminal and the like assuring a corotation preventing function. <P>SOLUTION: Fig.6(a) shows the punch-formed ground terminal 10, and a terminal block 11 is constituted of three ground terminals 10 integrated with one carrier 50. Then, the terminal block 11 composed of a plurality of the ground terminals 10 in one body is fed to an automatic crimping machine (not shown), and one locking end 30a of a back-edge locking piece 30 is separated from the carrier 50 as shown in fig.6(b). And then, as shown in fig.6(c), the back-edge locking part 30 of the ground terminal 10 is bent to bottom side. And, as shown in fig.6(d), core wire barrel 25 and coating barrel 26 are closed, and ground lead 82 is attached. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a terminal fitting and a terminal fitting group, and more particularly to a terminal fitting used when attaching a ground wire or the like to a vehicle body panel or the like and a terminal fitting group in which a plurality of terminal fittings are integrally formed.

  An automobile is equipped with many electrical devices, and many wire harnesses are arranged for signal transmission / reception and power supply. And in recent years, automobiles depend on electrical equipment so that it cannot be established without electricity. Therefore, the role of the cable such as the wire harness is important, and it is necessary to make every effort to connect the wiring.

  There are several types of wiring connections. For example, as shown in FIG. 1, a metal terminal fitting 200 is attached to the tip of the ground wire 82, and the terminal fitting 200 has a screw fixing (bolt fixing). The predetermined hole 223 is used to fix to the metal panel 90 of the vehicle body. Then, in order to facilitate the separation of the cable during recycling work, a hole is formed at the protruding base between the circular electrical contact portion at the tip of the terminal fitting and the substrate portion extending from the electrical contact portion, and breakage occurs. There is also a technique devised so that it is easy to do (for example, see Patent Document 1).

Moreover, in a production line for automobiles and the like, electric tools, pneumatic tools, and the like are often used for fixing terminal metal bolts. In that case, when the bolt 80 is fastened to the terminal fitting 200 as shown by a broken line in FIG. The ground wire 82 may be broken. Therefore, as shown in the ground terminal 100 of FIG. 2, the electrical contact portion 120 includes an insertion hole 123 for fastening the bolt 80 and a front end locking piece 130 at the front end. The front end locking piece 130 is bent toward the fixing target side (the metal panel 90 side), and is engaged with a panel locking hole 94 formed in the metal panel 90 when the ground terminal 100 is attached to the metal panel 90 such as a vehicle body. Stopped. In this ground terminal 100, since the front end locking piece 130 and the bolt 80 are fixed to the panel locking hole 94 and the bolt hole 92, respectively, when the bolt 80 is tightened, the front end locking piece 130 functions as a stopper, The earth terminal 100 is prevented from rotating. In addition, several techniques that realize such a rotation prevention function are disclosed (see Patent Document 2 and Patent Document 3).
JP 2003-47121 A JP 2000-168469 A JP 9-35791 A

  By the way, in the automobile industry, for example, weight reduction and cost reduction are made on a part-by-part basis. In other words, the accumulation of improvements in grams has reduced the weight and cost of the final product, the automobile. In the ground terminal 100 having a rotation preventing function as shown in FIG. 2, a front end locking piece 130 that is a detent is often formed at the tip of about 5 to 20 mm from the bolt fixing point. In this case, in order to facilitate the setting of the front end locking piece 130 itself and the punching molding of the ground terminal 100, the member may be wasted, and a technique for solving such a problem has been demanded.

  This invention is made | formed in view of such a condition, and it aims at providing the technique which can solve the said subject.

One embodiment of the present invention relates to a terminal fitting. This terminal fitting is formed of a conductive material, has a fixing hole, and is an electric contact portion fixed to a connection target, and a substrate that is continuously formed extending to the electric contact portion and to which an electric wire is attached. And an engaging piece that extends from the end of the substrate portion opposite to the electrical contact portion and can be bent toward the connection target side.
Moreover, the said locking piece may be isolate | separated from the strip | belt-shaped carrier for throwing into a predetermined automatic crimping machine.
In another aspect of the present invention, the plurality of terminal fittings and a strip-shaped carrier for loading into a predetermined automatic crimping machine are integrally formed so as to be separable.

  According to the present invention, in a terminal fitting used for a ground terminal or the like, it is possible to realize a weight reduction while ensuring a rotation prevention function.

  Hereinafter, the best mode for carrying out the invention (hereinafter referred to as “embodiment”) will be described with reference to the drawings. In the present embodiment, an example of a ground terminal attached to a ground wire is illustrated with respect to a terminal fitting attached to an end of a cable.

  FIG. 3 is a perspective view of the ground terminal 10 according to the present embodiment, showing a state separated from the metal panel 90 to be fixed. 4 shows a plan view of the ground terminal 10. In particular, FIG. 4 (a) is a plan view of the ground terminal 10 with the ground wire 82 attached, and FIG. FIG. 4C is a plan view of the ground terminal 10 in a developed state. Further, FIG. 5 shows a side view of the ground terminal 10 when attached to the metal panel 90 (the metal panel 90 is a sectional view). FIG. 5A shows the rear end locking piece 30 of the ground terminal 10. FIG. 5 (b) is a side view of the rear end locking piece 30 bent downward, and FIG. 5 (c) is a diagram showing the rear end locking piece 30 attached to the metal panel 90. The side view of the earthing terminal 10 of the state latched by the panel latching hole 94 is shown.

  The ground terminal 10 is made of a conductive metal plate, and as shown in FIG. 4C, a substantially rectangular base portion 22 and a substantially circular shape extending forward (upward in the drawing) of the base portion 22 are formed. An electrical contact portion 20 and a substantially rectangular rear end locking piece 30 formed to extend rearward (downward in the drawing) of the base portion 22 are provided. Further, the ground terminal 10 includes a pair of left and right core barrels 25 for caulking the core wire 84 of the ground wire 82 (see FIG. 4A) and a sheath barrel 26 for caulking the ground wire 82, respectively. It is equipped with.

  The electrical contact portion 20 is formed with an insertion hole 23 of a predetermined size through which a bolt 80 is inserted in the center portion for attachment to the metal panel 90. In addition, at the left and right end portions of the electrical contact portion 20, a pair of right and left restricting walls 24 are formed from a boundary portion with the base portion 22 to a position corresponding to the lower end portion of the insertion hole 23. These regulating walls 24 prevent the core wire 84 (see FIG. 4A) from opening to the left and right outside when the ground wire 82 is attached to the ground terminal 10.

  The rear end locking piece 30 extends rearward from the base portion 22, more specifically, in the wiring direction when the ground wire 82 is attached, and when attached to the metal panel 90, FIG. 5 (b), it is bent downward, and as shown in FIG. 5 (c), the locking piece end 30a of the trailing edge locking piece 30 is inserted into the panel locking hole 94 formed in the metal panel 90. Is done. As a result, when the ground terminal 10 is attached to the metal panel 90 with the bolt 80, even if a rotational moment is generated around the insertion hole 23 (bolt fixing point), the rear end member inserted into the panel locking hole 94. Since the stop piece 30 is locked in the panel locking hole 94, the rotation of the ground terminal 10 is prevented. In particular, since a sufficient distance can be secured from the insertion hole 23 to the rear end locking piece 30, the above-described rotation prevention is appropriately performed. Thereby, disconnection of the ground wire 82 as shown in FIG. 1 is prevented.

  FIG. 6 is a perspective view showing a change in shape from manufacture of the ground terminal 10 to use. The ground terminal 10 is formed by punching a conductive metal plate having a predetermined thickness, for example, a copper plate or an aluminum plate. FIG. 6A shows the ground terminal 10 in a stamped and molded state. As shown in the drawing, a plurality (three in the figure) of the ground terminals 10 are integrated with a ribbon-shaped carrier (feeding reel) 50. The terminal group 11 is formed. More specifically, the locking piece end portion 30a of the rear end locking piece 30 of each ground terminal 10 is connected to one side surface 54 extending in the longitudinal direction of the ribbon-like carrier 50 at a predetermined interval. In this state, the locking piece end 30a and the carrier 50 are easily separated. The core wire barrel 25 and the covering barrel 26 are bent so as to expand obliquely upward and toward the end.

  Next, the terminal group 11 in a state where the plurality of ground terminals 10 are integrally attached is put into an automatic crimping machine (not shown). As shown in FIG. 6B, the inserted terminal group 11 has the locking piece end portion 30 a of the rear end locking piece 30 separated from the carrier 50. Subsequently, as shown in FIG. 6C, the rear end locking piece 30 of the ground terminal 10 is bent downward. Then, as shown in FIG. 6D, the core wire barrel 25 and the covering barrel 26 are caulked, and the ground wire 82 is attached. FIG. 6E shows a state where the ground wire 82 is removed from the state shown in FIG.

  FIG. 7 is a diagram for comparing the ground terminal 10 of the present embodiment (FIG. 7A) and the conventional ground terminal 100 shown in FIG. 2 (FIG. 7B). As shown in FIG. 7A, compared to the ground terminal 100 of FIG. 7B, in the ground terminal 10 of the present embodiment, a region A indicated by a broken line ahead of the electrical contact portion 20 is omitted. . Therefore, the members corresponding to the region A can be reduced, and the weight of the ground terminal 10 can be reduced. Moreover, cost reduction can be realized by reducing the amount of members used.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to each of those components and combinations thereof, and such modifications are also within the scope of the present invention. For example, the rear end locking piece 30 is rectangular in plan view, but is not limited to this, and may be, for example, a triangle having the apex at the rear. In this case, the carrier 50 and the ground terminal 10 can be easily separated.

It is a perspective view of the common earthing terminal based on a prior art. It is a perspective view of the earthing terminal provided with the anti-rotation function based on a prior art. It is a perspective view of an earth terminal concerning an embodiment. It is a top view of an earth terminal concerning an embodiment. It is a side view of an earth terminal concerning an embodiment. It is the perspective view which showed the change of the shape from manufacture of a ground terminal to use based on embodiment. It is a figure for comparing the ground terminal of this embodiment which concerns on embodiment, and the conventional ground terminal.

Explanation of symbols

10 Ground terminal
11 Terminal group
20 Electrical contacts
22 Base part
23 Insertion hole
24 Restriction wall
25 core barrel
26 Covered barrel
30 Rear end locking piece
30a One end of locking
50 career

Claims (3)

An electrical contact portion formed of a conductive material, provided with a fixing hole, and fixed to a connection target;
A substrate portion that is continuously formed extending to the electrical contact portion and to which an electric wire is attached;
A locking piece that extends from the end of the substrate portion opposite to the electrical contact portion and can be bent to the connection target side,
A terminal fitting comprising:   The terminal fitting according to claim 1, wherein the locking piece is separated from a band-shaped carrier for feeding into a predetermined automatic crimping machine.   A group of terminal fittings, wherein the plurality of terminal fittings according to claim 2 and a strip-shaped carrier for feeding into a predetermined automatic crimping machine are integrally formed in a separable manner.

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